Ceriatone Amplification presents their tribute to the great guitarist/singer/songwriter John Mayer with the Joyful Music (JM) amplifier. Brilliant players like Jimi Hendrix, David Gilmour, Angus and Malcolm Young, Eddie Van Halen, James Hetfield, and Robben Ford have changed music as we know it not only with their undeniable skills as writers and players, but also with sonic signature. John Mayer is right up there with all of them.